Abstract: This paper discusses the stable nano-silver colloid with nano silica sol as carrier and glucose as reductant which has characteristics in structure and particle size of the sol. This synthesizing method uses thermal-UV dual curing emulsion as film-forming resin, nano-silver sol as antibacterial agents, and the design of waterborne antibacterial coatings modified by nano-silver. It also explores the effect of nano-silver sol in various mass fractions on antibacterial performance and formaldehyde degradation rate of waterborne wood coatings. The results show when mass fraction of nano-silver sol is 10%, the nano-silver antibacterial waterborne wood coatings have satisfactory performance with over 90% antibacterial rate against Escherichia coli and staphylococcus aureus. And after 48 h daylight the volatility of formaldehyde will reach 70%.

Key words: nano-silver colloid; waterborne wood coatings; antibacterial performance; formaldehyde degradation rate